SQL - I've written more SQL than I'd like :P Mostly for SQL Server and MySQL, but I wrote a little for Oracle too.

HTML, CSS, JavaScript, XHTML, XML, XSD - I can work with HTML and CSS fairly well, but I have NO design talent! But I could probably reproduce a Photoshop mockup with markup, and can slice and dice images fairly well.

JavaScript - I was writing JavaScript before jQuery, but I never liked it :P Now JavaScript is fun again.